Translated placeholder for 2-way bound input using tagless component wrapper

components.translated-placeholder-input.js

import Ember from 'ember';
const translations = {
  placeholder: "Type here..."
};
export default Ember.Component.extend({
  //creates the component without an enclosing div
  tagName: "",
  translatedPlaceholder: Ember.computed('placeholderKey', function(){
    let key = this.get('placeholderKey');
    if(!key){
      return ""; 
    }
    return translations[key] || `${key}_NOT_FOUND`;
  })
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

{{translated-placeholder-input value=value placeholderKey="placeholder"}}
{{value}}

templates.components.translated-placeholder-input.hbs

{{input value=value placeholder=translatedPlaceholder}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}